Update documentation and create development roadmap

[NiceAndPeter]

Updates:

• CLAUDE.md: Added comprehensive Phases 112-114 documentation

  • Phase 112: std::span integration + operator type safety + InstructionView
  • Phase 113: Boolean predicates + loop modernization
  • Phase 114: NULL to nullptr modernization
  • Updated performance status and recent achievements

• New Documentation:

  • docs/ROADMAP_2025_11_21.md: Comprehensive roadmap with prioritized TODO list
  • docs/STATUS_UPDATE_2025_11_21.md: Detailed status assessment

• Historical Plan Marking:

  • Marked ENCAPSULATION_PLAN.md as complete
  • Marked CONSTRUCTOR_PLAN.md as complete
  • Marked LUASTACK_AGGRESSIVE_PLAN.md as complete
  • Marked LUASTACK_ASSIGNMENT_PLAN.md as complete
  • Marked AGGRESSIVE_MACRO_ELIMINATION_PLAN.md as ongoing

Current Status:

• Performance: 4.62s avg (target ≤4.33s) - needs optimization
• Code Quality: 96.1% coverage, zero warnings, all tests passing
• Modernization: ~87% complete

Next Steps:

• Phase 115: Complete 8 boolean return conversions (2h, LOW risk)
• Phase 116: Document GC modularization (2-3h)
• Phase 120: Address performance regression (4-6h)